Example #19: Improper combination of more stream manipulators

lesson7/lazy_streams/19_combinations_error.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"github.com/wesovilabs/koazee"
+)
+
+func printInt(x int) {
+	fmt.Printf("%d\n", x)
+}
+
+func doubleValue(x int) int {
+	return x * 2
+}
+
+func negate(x int) int {
+	return -x
+}
+
+func evenValue(x int) bool {
+	return x%2 == 0
+}
+
+func divisibleBy3(x int) bool {
+	return x%3 == 0
+}
+
+func main() {
+	values1 := []int{1, 2, 3}
+	fmt.Printf("input #1: %v\n", values1)
+
+	stream1 := koazee.StreamOf(values1).
+		Filter(evenValue).
+		Filter(divisibleBy3).
+		Map(negate).
+		Map(doubleValue)
+	stream1.ForEach(printInt).Do()
+}